Event-driven dialog queue, story flag command, mod unit tests

Push-based event chains, runtime fixes (single end, goto lifecycle, if,
busy box, held delay, empty options, timed/animated/effect actions), the
'flag name value' DSL command, autoplay --dialogs=N, 19 mod unit tests.

.gitignore

@@ -1,37 +1,37 @@
-# Godot 4.x
-.godot/
-.idea/
-sdk/
-bin/
-obj/
-
-#ai
-.omo/
-.opencode/
-
-gen/
-obj/
-bin/
-
-*.tres~
-*.tscn~
-
-# GDScript LSP
-.godot/
-
-# Export
-*.exe
-*.dmg
-*.apk
-*.aab
-*.pck
-*.zip
-*.log
-
-# OS
-.DS_Store
-Thumbs.db
-
-# Editor
-*.import
-*.godot.uid
+# Godot 4.x
+.godot/
+.idea/
+sdk/
+bin/
+obj/
+
+#ai
+.omo/
+.opencode/
+
+gen/
+obj/
+bin/
+
+*.tres~
+*.tscn~
+
+# GDScript LSP
+.godot/
+
+# Export
+*.exe
+*.dmg
+*.apk
+*.aab
+*.pck
+*.zip
+*.log
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Editor
+*.import
+*.godot.uid